MolluscaBase eds. (2024). MolluscaBase.
Petrasma Dall, 1908. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024) European Register of Marine Species at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=536020 on 2024-09-03